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vsepr shape

Posted: Sat Nov 24, 2018 9:47 am
by katietietsworth_3c
Does anyone have a trick to figuring out the vsepr shape from the lewis structure?

Re: vsepr shape

Posted: Sat Nov 24, 2018 10:12 am
by sallina_yehdego 2E
The two models are pretty similar, but I first start by drawing out the lewis structure in the most linear shape as possible. Then I add the dotted and darkened lines as much needed. I also circle in the lone pairs. From there, I find it easier to the the VSEPR shape. Hope this helps.

Re: vsepr shape

Posted: Sat Nov 24, 2018 10:13 am
by sallina_yehdego 2E
Here's a website that can also help.

http://chemed.chem.purdue.edu/genchem/t ... vsepr.html

Re: vsepr shape

Posted: Sat Nov 24, 2018 11:42 am
by Maria Nabagala 3E
sallina_yehdego 1B wrote:Here's a website that can also help.

http://chemed.chem.purdue.edu/genchem/t ... vsepr.html


This is very helpful

Re: vsepr shape

Posted: Sat Nov 24, 2018 11:44 am
by Rylee Nelsen 3A
I made a chart for the VSEPR model that shows each lewis structure and the particular shape, angle and # of lone pairs that it corresponds to. I would just memorize some of them, it makes it easier to identify atoms.

Re: vsepr shape

Posted: Sat Nov 24, 2018 1:22 pm
by 705152867
Taking into account formal charge and drawing out the correct Lewis structure will help you find the VSEPR model that corresponds to it. Finding a chart online or even making one on your own can help you memorize the bond angles, # lone pairs, etc. that are needed in each model.

Re: vsepr shape

Posted: Sat Nov 24, 2018 5:20 pm
by Madeline Motamedi 4I
An additional way to go about this is by first drawing the lewis structure, then actually going to classify which VSEPR formula it falls under for example, AX2. From there you can memorize or start to familiarize yourself with which structures and shapes correspond to which formulas and determine the shapes.